13051224521 has 4 divisors (see below), whose sum is σ = 13051981332. Its totient is φ = 13050467712.

The previous prime is 13051224493. The next prime is 13051224541. The reversal of 13051224521 is 12542215031.

13051224521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12542215031 = 23 ⋅545313697.

It can be written as a sum of positive squares in 2 ways, for example, as 3217725625 + 9833498896 = 56725^2 + 99164^2 .

It is a cyclic number.

It is not a de Polignac number, because 13051224521 - 2⁶ = 13051224457 is a prime.

It is a super-2 number, since 2×13051224521² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13051224541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 351920 + ... + 387233.

It is an arithmetic number, because the mean of its divisors is an integer number (3262995333).

Almost surely, 2^13051224521 is an apocalyptic number.

It is an amenable number.

13051224521 is a deficient number, since it is larger than the sum of its proper divisors (756811).

13051224521 is an equidigital number, since it uses as much as digits as its factorization.

13051224521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756810.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 13051224521 its reverse (12542215031), we get a palindrome (25593439552).

The spelling of 13051224521 in words is "thirteen billion, fifty-one million, two hundred twenty-four thousand, five hundred twenty-one".